setserial

Read and modify serial port information. More information: https://manned.org/setserial.

• Print all information about a specific serial device:
  setserial -a {{/dev/cuaN}}
• Print the configuration summary of a specific serial device (useful for printing during bootup process):
  setserial -b {{device}}
• Set a specific configuration parameter to a device:
  sudo setserial {{device}} {{parameter}}
• Print the configuration of a list of devices:
  setserial -g {{device1 device2 ...}}